Geoegb alexandeb dick



UNTTED STATES PATIENT Orrrcn.

GEORGE ALEXANDER DICK, OF LONDON, ENGLAND.

- MANUFACTURE OF METALLlC ALLOYS.

SPECIFICATION forming part of Letters Patent No. 306,229, dated October 7, 1884. I

Application filed April 23, 1884.

To all whom it may concern.-

Be it known that I, Gnonen ALEXANDER DICK, of London, England, engineer, have invented certain new and useful Improvements in the Manufacture of Metallic Alloys, of which the following is a specification.

My said invention relates to improvements in the manufacture of manganese copper; and it consists in separating the manganese contained in ferro-manganese, and causing it to combine with copper by melting the ferromanganese with copper in the presence of silicinm. At present manganese copper is ordinarily manufactured by reducing oxide of manganese with charcoal at a very high-ten]- perature, and then adding thereto the requisite quantity of copper. This process is very slow, and owing to the very high temperature employed the oxides attack the crucibles considerably, while at the same time only the richest and purest, and consequently a very expensive, oxide of manganese can be used. These objections are obviated by the method hereinafter described.

For the purposes of this invention I take a quantity of the following metals: First, ferromanganese, selecting, by preference, that which contains a large percentage of manga nese; second, pure copper. In some cases the ferro-manganese will be found to contain a sufficient quantity of silicinm; but when that is not the case a quantity of silicious iron containing, by preference, a large percentage of silicinm is added to the above-named'metals. These metals are melted together in acrucible, and upon pouring the melted mass out into ordinary molds it will be found that the manganese has combined with the copper, while the iron, combined with the silicinm,

(No specimens.)

I have found that advantageous results are obtained by regulating the proportions of the various metals in such a way that the quantity of manganese in the manufactured manganese copper is from about forty to sixty per cent. of the copper, and that the quantity of 5 5 either separately or combined together in the form of ferromanganese, have been previously used to improve brass and gun-metal, (alloys of copper and zinc or tin in various proportions,)but in such process the ferro-manganese enters into apermanent union with the alloys mentioned. In the present invention either ferro-mang'anese containing silicinm in proper proportions, or ferro-manganese and silicious iron are melted together with pure copper for obtaining a union of the manganese and copper, after which the silicinm and iron are re moved, such process being different from that above mentioned for improving brass and gunmetal by adding ferro-manga-nese thereto.

\Vhat I claim is The method of obtaining manganese copper, consisting in melting together copper and ferro-manganese containing silicinm, and in cases where the silicinm is not present in the ferro'inanganese in sufficient quantity adding silicious iron to the ferromanganese and copper, then separating the siliciu m and iron from the alloy of manganese and copper, substanforms a layer upon the manganese copper. tially as herein set forth.

This layer of iron and silicinm is removed, and the manganese copper run into ingots.

I have found that the greater the quantity of silicinm contained in the mixture the more perfect is the separation of the manganese copper from the iron and silicinm; but a quantity of silicinm as small as one per cent. of the manganese present suffices to produce the desired effect.

GEORGE ALEXANDER DIGK.

XVitnesses:

J oHs. BULL,

186 Richmond Road, J-Rwlmcy, London. Gno. S. VAUGHAN,

57 Chancery Lane, London. 

